#51AF2D
Closest named color: Grass (#5CAC2D). oklch(67.1% 0.186 138.7), rgb(81, 175, 45).
Aa
Black text reads best on this color (7.51:1).
About this color
#51AF2D is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.186 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.012 away. Black text reads best on it, at 7.51:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.51:1 |
| White text | 2.79:1 |
Values
| HEX | #51AF2D |
| RGB | rgb(81, 175, 45) |
| HSL | hsl(103, 59%, 43%) |
| OKLCH | oklch(67.1% 0.186 138.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #51AF2D | 2.79:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #51AF2D | 7.51:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #51AF2D text on white | 2.79:1 | Fails | Lc 53.4 | Large or bold text, headings |
| #51AF2D text on black | 7.51:1 | AAA | Lc -48.4 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#F0F8EE
oklch(97% 0.016 139.4)
-
Step 100
100
#DFF0DA
oklch(93.7% 0.034 138.6)
-
Step 200
200
#C4E4BB
oklch(88.5% 0.065 138.8)
-
Step 300
300
#9AD389
oklch(80.9% 0.117 138.7)
-
Step 400
400 (this color)
#51AF2D
oklch(67.1% 0.186 138.7)
-
Step 500
500
#3DA300
oklch(63% 0.197 138.7)
-
Step 600
600
#328900
oklch(55.5% 0.174 138.7)
-
Step 700
700
#297400
oklch(49.2% 0.154 138.7)
-
Step 800
800
#205F00
oklch(42.8% 0.134 138.7)
-
Step 900
900
#194F00
oklch(37.7% 0.118 138.8)
-
Step 950
950
#0C2F00
oklch(26.9% 0.084 138.6)
#51AF2D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #B49F13 | 0.121 |
| Deuteranopia (no green cones) | #A8983A | 0.121 |
| Tritanopia (no blue cones) | #49A996 | 0.128 |
| Achromatopsia (no color) | #9B9B9B | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AF2D
#51AF2D
oklch(67.1% 0.186 138.7)
- #C56ADD
#C56ADD
oklch(67.2% 0.186 318.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #51AF2D, closest first.
No curated palette has a color within ΔE 0.04 of #51AF2D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.012
- Leaf Green #5CA904 ΔE 0.019
- Leafy Green #51B73B ΔE 0.023
- Medium Green #39AD48 ΔE 0.026
- Shamrock #01B44C ΔE 0.033
- Leaf #71AA34 ΔE 0.034
- Mid Green #50A747 ΔE 0.036
- Kelly Green #02AB2E ΔE 0.038
Use #51AF2D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.